http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Leaching kinetics of calcined magnesite in acetic acid solutions
Bunyamin Donmez,Fatih Demir,Oral Lac¸in 한국공업화학회 2009 Journal of Industrial and Engineering Chemistry Vol.15 No.6
The leaching kinetics of calcined magnesite by using acetic acid solutions was investigated in a batch reactor by using the parameters such as temperature, acid concentration and particle size. The experimental results were successfully correlated by linear regression using Statistica Package Program. Dissolution curves were evaluated in order to test shrinking core models for fluid–solid systems. It was concluded that the leaching of calcined magnesite was controlled by chemical reaction. In addition, the fact that leaching was controlled by the chemical reaction was also supported with the relationship between the reaction rate constant and the particle radius. The apparent activation energy of dissolution process was found as 34.60 kJ mol1.
Optimization of removal of lead from bearing-lead anode slime
Talip Havuz,Cafer Celik,Bunyamin Donmez 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.3
An optimization process is conducted by the Taguchi experimental design method for removal of lead from decopperized anode slime in aqueous Na2CO3/HNO3 media. The effects of parameters such as reaction temperature, Na2CO3 concentration, solid–liquid ratio and reaction period on the conversion are studied. It is seen that the most important parameters affecting the conversion of lead sulphate to lead carbonate are solid–liquid ratio and reaction period. The optimum conversion conditions for process are found to be solid–liquid ratio of 0.05 g/mL, reaction period of 600 s, reaction temperature of 50 8C and Na2CO3 concentration of 2 M. Under optimal conditions, the experimental results put out that the conversion of lead sulphate at the 95% confidence level can be 97%, approximately. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.